JP3157724U - Beam shape converter - Google Patents

Abstract

Provided is a light beam shape converter for converting a point light source to emit as a rectangular projection surface. A light beam shape converter of the present invention is a light beam shape converter that converts a point light source and emits it as a rectangular projection surface. The light beam shape converter is mainly a composite optical surface, and an incident surface is an incident surface. An optically refracting body that is an indented spherical surface, the exit surface comprising a refracting plane, two reflecting surfaces provided on both sides of the meridian, and two optical curved surfaces connected to opposite sides of the refracting plane before and after the meridian The incident surface causes the light beam to completely act on the inner spherical surface of the refracting body, and the interaction of the composite optical surface normalizes the radiant light beam of the point light source at the respective traveling angles, thereby converting the shape of the light beam. And can be emitted as an optical projection surface close to a rectangle. [Selection] Figure 1

Description

  The present invention relates to a light beam shape converter that converts a projected light beam of a point light source into a rectangular projection surface, and in particular, converts a solid conical illumination light shape into a pyramid shape, and makes the irradiation surface a surface close to a rectangle. The present invention relates to a luminous flux shape converter.

  If the irradiation angle of the light beam emitted by the illumination device is not specified, the light beam cannot be effectively collected on the projection surface that needs to be irradiated with light. A conventional light bulb uses a lamp cover to reflect back light and concentrate the light flux on a necessary irradiation surface (projection surface). In the newer one, the light flux generated by the diode light-emitting device is provided with a small reflecting surface in advance on the inner back surface of the diode light-emitting element body, and the light flux generated by the element is projected toward the front. In addition, the luminous flux generated by the LED can be effectively controlled to an angle as desired, such as 15, 30, 45, 60 degrees, etc., according to the norm of the curvature of the reflecting surface, and each projection angle can be adjusted according to the needs of the use site. Adoption can be decided accordingly.

  Whether it is a conventional light bulb or a newer diode LED light source, its light emitting point is a point light source, the light shape after being reflected by the reflective cover is conical, and the illumination projection surface is all circular or If the surface of an ellipse is to be used in a special situation such as the surface of a street or a square floor space at home, the shape of the light beam is converted into a pyramid shape, etc., when the light beam from the light source is to be collected effectively Thus, the bottom surface (projection surface) can be specified as a rectangle or a rectangle.

  The main object of the present invention is a spherical surface having an exit surface composed of a refractive body composed of a composite of a plurality of optical surfaces, and a light incident surface recessed inward, and a point light source utilizing the curvature of the spherical surface. When the light flux generated by the light enters, the entire amount can be allowed to enter the refracting body while avoiding the refraction critical angle, and an elementary light diffusing action can be provided, and the exit surface is formed from a plurality of optical surfaces. In general, a refracting plane is provided at the center of the exit surface. The refracting plane is connected to two meridian surfaces whose optical axes intersect the optical axis of the refracting plane in the meridian direction, and on both sides of the meridian. A reflecting surface having a reflecting ability is provided, and the angle between the two reflected light beams facing each other is limited by using the reflecting surfaces on both sides, and the reflected light beam is reduced to reduce the required illumination area of the projection surface. Can be projected on both sides parallel, two optical curved surfaces and refraction Surfaces interact, it is possible to distribute the illumination light beam of the point-like light source as illumination projection plane closer to a rectangle with a longer base length of the projection surface, to provide a light shaping unit.

  Another object of the present invention is that the reflecting surfaces provided on both sides of the meridian of the exit surface of the refracting body are perpendicular to the refracting plane, and the two reflecting surfaces have an inner reflecting action, and the reflecting layer film facing inward or An object of the present invention is to provide a light beam shape converter capable of providing a plurality of reflecting mirrors.

  A light beam shape converter of the present invention is a light beam shape converter for converting a point light source into a rectangular projection surface, wherein the converter comprises a refraction body having an entrance surface and an exit surface, of which the The entrance surface is composed of an inner spherical surface, the exit surface is composed of a composite of a plurality of optical surfaces, and the plurality of composite surfaces include a refractive plane whose optical axis overlaps the optical operation axis of the concave spherical surface, and the refractive plane Two optical curved surfaces connected along a plane side line in the meridian direction, and two reflecting surfaces located on both sides of the meridian of the exit surface and connected at two angles to the two sides of the refractive plane. In addition, an intersection of extending two axes of the two optical curved surfaces is located in the direction of the incident surface and intersects the optical operation axis.

It is a three-dimensional external view of the refraction body of the present invention. It is a side view of the projection unit comprised combining the light emission unit with the refractive main body of this invention. It is a side view which shows advancing of the light beam of the projection unit comprised combining the light emission unit with the refractive main body of this invention. It is a side view of the meridian position of the refraction body of the present invention. It is a front view of the meridian position of the refraction body of the present invention. It is a three-dimensional view showing the illuminance block on the rectangular projection surface after conversion by the light beam shape converter of the present invention. It is a top view which shows the state which implemented this invention in the light emission surface of an illuminating device. FIG. 8 is a side view of FIG. 7. It is a figure which shows the application in the simulation road of this invention. It is a figure which shows the illumination intensity block distribution after the effect | action of FIG. It is a figure which shows the system which acquires the uniform and high-intensity single projection surface by the method of overlapping the several projection surface of this invention.

  Detailed implementation contents of the present invention will be described. First, as shown in FIG. 1 and FIG. 2, a light beam shape converter 10 of the present invention is mainly configured by connecting a bottom plate 11 to the bottom surface of a refraction body 1 having a high light transmittance, and the bottom plate 11 has an external coupling action. The refracting body 1 includes an exit surface 2 formed by combining a plurality of optical surfaces on the outer surface, and the plurality of optical surfaces of the exit surface 2 have the same direction as the bottom plate 11 in the center. The optical surface 22 is provided in the meridional direction of the surface of the refractive plane 21 with the plane of the refractive plane 21 as a reference and the side line 210 as an intersection line. Two reflecting surfaces 23 perpendicular to the angle of the refracting plane 21 are provided on both sides of one meridian, and an entrance surface is provided on the back surface of the refracting plane 21 contrary to the exit surface 2. The inner spherical surface 24, and the Recessed light axis S to the traveling optical axis S of light refraction plane 21 of the spherical 24 is overlapped, the light emitting unit 3 is disposed on the inner Recessed spherical 24 outside the same optical axis S.

  A coupling portion 12 is provided at the bottom of the bottom plate 11, and the coupling portion 12 is coupled to the circuit board 5 by a coupling member 51, and the coupling member 51 acts on a protruding portion 121 installed in the coupling portion 12 to dry. Form a bond. In addition, the coupling portion 12 and the circuit board 5 can be achieved by using an adhesive or other screw fixing method. The optical axis S of the refractive body 1 is mainly the center of the light beam emitting portion of the light emitting unit 3. Keep it facing the front.

  The light beam shape converter 10 of the present invention forms the projection unit 100 after the light emitting unit 3 is coupled. Further, the light emitting unit 3 and the circuit board 5 are electrically connected, and the light emitting unit 3 can obtain driving power, and the power is conducted from the circuit board 5 to an external power source. Since this is a general technique, the description is omitted here.

  In the projection unit 100 (see FIG. 3) formed after the light beam shape converter 10 and the light emitting unit 3 are combined, the light beam generated by the light emitting unit 3 acts on the inner spherical surface 24 of the light beam shape converter 10. The light emission angle of the light emitting unit 3 is surrounded by using the curvature of the inner spherical surface 24, whereby all the light beams generated by the light emitting unit 3 pass the norm of the curvature of the inner spherical surface 24 and thereby the light beam shape converter 10. It is possible to avoid the occurrence of useless reflection loss of the light flux due to the problem of the refraction critical angle by entering the inside, and the total amount of the light flux can be applied to the inside of the light beam shape converter 10. In the case where the light emitting unit 3 is a single point light source, for example, when the light source has a radiation angle of 60 ° and does not exceed the path distance L between the light source and the inner spherical surface 24, the two oblique sides of the radiation angle are indented. Located within the spherical surface range of the spherical surface 24, the entire amount of the luminous flux Bn enters the refractive body 1 via the inner spherical surface 24. The generated light beam is basically diffused by the principle of refraction inside the light beam shape converter 10 due to the normal of the inner spherical surface 24, and is uniformly diffused in the quadrant to refraction the light beam shape converter 10. After passing, it is ejected from the ejection surface 2.

Traveling optical axis S of light refraction plane 21 above overlaps with the optical axis of the Recessed spherical surface 24, the two optical axes S ₁ of the two optical curved surface 22 intersects the incident plane direction and the refractive plane 21 of the light It overlaps with the traveling optical axis S.

  4 and 5, the light beam shape converter 10 of the present invention is combined with the light emitting unit 3 to form a projection unit 100, and the meridian side direction of the light beam shape converter 10 is the exit surface thereof. 2 is composed of a refractive surface 21 and an optical curved surface 22 connected to both sides, and three optical surfaces are formed. For this reason, the point light source generated by the light emitting unit 3 enters the light beam shape converter 10 from the inner spherical surface 24 and is pierced from the exit surface 2 after passing through the refractive transmission, and the planar action of the refractive plane 21 and the optical function. Based on the curvature action of the curved surface 22, the light beam generated by the light emitting unit 3 is reflected to form a diffracted refracted light beam Bt, and diffused by three optical surfaces to form a light projection angle of nearly 120 degrees, thereby producing a projection surface 6. The long side a of the rectangular surface of the projection surface 6 is projected.

  As shown in FIG. 5, the light beam shape converter 10 is combined with the light emitting unit 3 to form a projection unit 100, and the light beam generated by the light emitting unit 3 enters the light beam shape converter 10 from the inner spherical surface 24. And reflected. The reflection angles of the reflecting surfaces 23 provided on both sides of the light beam shape converter 10 are limited, and the light beam generated by the light emitting unit 3 forms the reflected light beam Br through the reflecting action of the reflecting surface 23, and the reflected light beam Br is limited. It acts on the surface of the projection surface 6 after contraction and becomes the short side b of the rectangular projection surface 6. The projected area can be obtained by multiplying the long side by the short side.

  The exit surface 2 of the light beam shape converter 10 is composed of a refracting plane 21 and reflecting surfaces 23 on both sides in the direction of FIG. Basically, the reflection surface 23 is an optical surface having a high reflectance, and the reflection member 231 is coupled by a method of adding an electroplating film or a reflection mirror (not shown) to enhance the reflectance toward the inside, and the light emitting unit. 3 is totally reflected by the reflecting surface 23, and the generated light beam is completely reflected through the action of the reflecting surface 23 to emit the reflected light beam Br, or by the action of the refracting plane 21. Direct refraction can also be emitted.

  As shown in FIG. 6, the luminous flux shape converter 10 of the present invention is combined with the light emitting unit 3 to form a projection unit 100. Two or more sets of the projection units 100 are arranged at a certain height. A larger projection surface 6 can be formed. At a certain height, the length and width of the projection surface 6 can be configured by arranging a plurality of projection units 100 side by side, and the configured projection surface 6 forms an overlapped state. The irradiation luminance can be increased and the luminance can be made more uniform. Of these, the projection plane forms a rectangular projection plane after the operation of FIGS. 3 and 4, and the rectangular projection plane is used for a street surface or a rectangular floor space in a room. Can do.

  The projection surface 6 is subjected to the norms of FIG. 5 and FIG. 6 and then its light density is concentrated on both sides of the central vertical line and the long side of the projection surface 6, and basically three different brightness blocks are roughly arranged. It is divided into. For example, when both sides have illuminance of 40 (Lx), three illuminance blocks of 30 (Lx) and 20 (Lx) that decrease toward the center are formed, and projection of another projection unit 100 between these three blocks. The surface 6 can be overlapped to enhance the light density and make the luminance uniform.

  The present invention can be used by being applied to an illuminating device by using the principle described above and accumulating a luminous flux. As shown in FIGS. 7 and 8, a plurality of projection units 100 are arranged in a matrix manner on the surface of the light emitting surface 41 of the illumination device 4, and the light emitting units 3 of the plurality of projection units 100 are as shown in FIG. An optical illumination function of the projection surface 6 is generated. Since the plurality of projection units 100 are concentrated on the circuit board 5 in the same manner as in FIG. 2 and a mechanism for heat dissipation is required, a heat dissipation hole 43 is installed around the light emitting surface 41 of the lighting device 4 to heat the internal unit. Can be exchanged with external cold air to achieve a heat dissipation effect. The lighting device may be provided with a connecting portion 42 on one side and installed on a wall surface or a high place to illuminate the floor surface with light.

  As shown in FIG. 8, after the plurality of projection units 100 are arranged in a matrix, as can be seen from the side, the plurality of projection units 100 are distributed inside the illumination device 4, and each has a light flux with an irradiation angle of 120 degrees. B is generated. Since the projection units 100 are assembled in such a manner that they are arranged side by side in a state of approaching the front and rear, the angles of the light beams emitted by the projection units 100 are the same, the traveling paths of the light beams B overlap with neighboring ones, and a plurality of After the projection units 100 are assembled, the radiation angle of the entire illumination device 4 is also the same 120 degrees. Similarly, the meridian direction of the lighting device 4 is 60 degrees as in the case of FIG. 5, and after the implementation of FIG. 7, a plurality of projection units 100 are accumulated to form higher brightness, can do.

  As shown in FIG. 9, when the present plan is used for a ground surface area having two parallel side lines such as on a road, the prototype of the present invention is obtained on a standard four-lane 16.5 meter wide road. The lighting devices 4 facing each other are installed at a distance of meters, and the light emission altitude of the lighting device 4 is 8 meters.

  As shown in FIG. 10, after the implementation of FIG. 9, necessary projection surfaces 601, 602, 603, 604 are formed on the road surface, and an irradiation area composed of a plurality of projection surfaces 601, 602, 603, 604 is the road surface. The surface area requirement can be met.

  Each projection plane 601, 602, 603, 604 projected by each lighting device 4 (see FIGS. 9 and 10) has the same light density distribution as the effect of three different light and dark blocks on the projection plane 6 in FIG. It becomes like this.

  The illumination angle of the illuminating device 4 can be adjusted, and by forming an overlap on each projection surface 601, 602, 603, 604, the prototype of the present invention is relatively regular on the projection surfaces 601, 602, 603, 604. Form a light density projection block, combined with a relatively large light density in the middle of the road, the illuminance can reach 40 (Lx), and reach the illuminance of 40 (Lx) on both sides of the road as well Therefore, when implemented on a 16.5 meter wide four-lane standard road, it can meet the needs of night driving and can be implemented as concrete road or street lighting. The present invention uses a prototype simulating a 16.5 meter wide four-lane standard road, and the lighting device 4 is installed on one side of the route even if the road is less than 16.5 meters wide or 8 meters wide. It only needs to be implemented, and it is not necessary to carry out symmetrically on both sides of the road.

  In the present invention, in a situation where a plurality of illumination devices 4 are implemented under the condition of the projection surface 6 as shown in FIG. An expression can be formed (see FIG. 11). After a plurality of illumination devices 4 can be implemented on a single projection surface 6 and the projection angle of each illumination device 4 is converted, the projection surfaces 601, 602, 603, 604 are overlaid at nearly the same angle, Due to this overlap, a projection effect in which the luminance is very uniform and high luminance is accumulated can be obtained. Therefore, based on the projection block of FIG. 6, the projection surfaces 601, 602, 603, and 604 can be overlapped to obtain a very uniform luminance and high-density optical irradiation surface on the actually required projection surface 6. .

1 Refraction body
DESCRIPTION OF SYMBOLS 10 Light beam shape converter 100 Projection unit 11 Bottom plate 12 Coupling part 121 Projection part 2 Ejection surface 21 Refraction plane 210 Side line 22 Optical curved surface 23 Reflection surface 231 Reflection member
24 Inner spherical surface 3 Light emitting unit 4 Illumination device
41 Light Emission Surface 42 Connecting Portion 43 Heat Dissipation Hole
5 Circuit board 51 Coupling member 6,601,602,603,604 Projection surface
B, Bn Light flux Bt Refraction light flux Br Reflected light flux
a Long side b Short side S Optical axis S ₁ Optical axis L Path distance

Claims (4)

A light beam shape converter for converting a point light source into a rectangular projection surface, wherein the converter comprises a refractive body having an entrance surface and an exit surface, of which the entrance surface comprises an inward spherical surface, The exit surface is composed of a composite of a plurality of optical surfaces, and the plurality of composite surfaces are along a refraction plane whose optical axis overlaps the optical operation axis of the inner spherical surface and a meridian plane side line of the refraction plane. Two optical curved surfaces connected to each other on both sides of the meridian of the exit surface and connected to two sides of the refracting plane at a constant angle. A light beam shape converter characterized in that an intersection obtained by extending two axes is located in the direction of the incident surface and intersects the optical operation axis. The light beam shape converter according to claim 1, wherein the reflecting surface and the refracting plane are perpendicular to each other. The light beam shape converter according to claim 1, wherein a reflecting member is provided on the reflecting surface. The light beam shape converter according to claim 1, wherein a bottom plate is coupled to a bottom surface of the refractive body.

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